PHP压缩html的函数代码

<?php
//函数名: compress_html
//参数: $string
//返回值: 压缩后的$string
//by www.jb200.com
function compress_html($string) {
    $string = str_replace("rn", '', $string); //清除换行符
    $string = str_replace("n", '', $string); //清除换行符
    $string = str_replace("t", '', $string); //清除制表符
    $pattern = array (
                    "/> *([^ ]*) *</", //去掉注释标记
                    "/[s]+/",
                    "/<!--[wWrn]*?-->/",
                    "/" /",
                    "/ "/",
                    "'/*[^*]**/'"
                    );
    $replace = array (
                    ">1<",
                    " ",
                    "",
                    """,
                    """,
                    ""
                    );
    return preg_replace($pattern, $replace, $string);
}